Atomic Layers of B2 CuPd on Cu Nanocubes as Catalysts for Selective Hydrogenation.

The search for highly active and selective catalysts with high precious metal atom utilization efficiency has attracted increasing interest in both the fundamental synthesis of materials and important industrial reactions. Here, we report the synthesis of Pd-Cu nanocubes with a Cu core and an ordered B2 intermetallic CuPd shell with controllable atomic layers on the surface (denoted as Cu/B2 CuPd), which can efficiently and robustly catalyze the selective hydrogenation of acetylene (CH) to ethylene (CH) under mild conditions. The optimized Cu/B2 CuPd with a Pd loading of 9.

Structural and Kinetic Characterization of Hyperthermophilic NADH-Dependent Persulfide Reductase from .

NADH-dependent persulfide reductase (Npsr) has been proposed to facilitate dissimilatory sulfur respiration by reducing persulfide or sulfane sulfur-containing substrates to HS. The presence of this gene in the sulfate and thiosulfate-reducing DSM 4304 and other hyperthermophilic appears anomalous, as is unable to respire S and grow in the presence of elemental sulfur. To assess the role of Npsr in the sulfur metabolism of DSM 4304, the Npsr from was characterized.